Lamm Owners: M2.2 Problems

Check the manual, also swap the input 6922 tubes from left to right monoblock to see if that fixes it. Otherwise time to check fuses.

Does this happen during periods of "high humidity"? My friends' M1.1s did this.He used a hair-drier before turning on his unit-only one amp required this.Vladmir was having trouble diagnosing that one

Sorry, neither me nor either of my two friends have had this problem.
Cytocycle's advice is good, as it might determine if it is just a tube problem.
(If it is, great, a cheap solution!)

If not, ouch, as that means sending them back to Lamm. (Something I am not looking forward too, if, and/or when, my amps experience problems.)

Good Luck, and I hope it is a tube!!!!!

It could also be a shorted speaker cable or blown driver.